Humminbird XTM-9-HW-T Dual Spectrum CHIRP Trolling Motor Transducer w/Temp f/HELIX [710277-1]XTM 9 HW T Dual Spectrum CHIRP Trolling Motor Transducer with Temp for HELIX Trolling Motor Dual Spectrum CHIRP Transducer supports Dual Spectrum CHIRP 2D Sonar with high frequency beam and wide cone angle, offering CHIRP range of 150 220kHz. Includes built in temperature sensor, rugged composite design and 20 cable. Features: This accessory is compatible with the following Humminbird products: HELIX 5 CHIRP G2 GPS equipped models only, HELIX 7 CHIRP